Handheld scientific statistical calculator features a 10 + 2 digit display, 142 functions, and a large, high-contrast LCD that makes calculations easy and comfortable. Functions include chain multiplication/division, constant multiplication/division/percentage calculations, exponential, factorials, hyperbolic, logarithmic, mean, octal binary hexadecimal, square, standard deviation of population, standard deviation of sample, trigonometric, reciprocal calculations, DRG mode calculation, trigonometric calculation, coordination conversion, base-N calculation (binary, octal, decimal, dexadecimal), sum of value, permutations, combinations, linear regression, random number generation, and last digit recall. Dual power source includes battery and solar. Calculator automatically switches off after 7 minutes of nonuse. Design includes a protective hard case and durable plastic keytops.